Stainless steel stop valve is one of the stop valves. It has high requirements for valve body materials. Generally, there are several materials such as 301.304.316, which are widely used in Dalian marine valve, chemical industry, shipping, medicine, food machinery and other industries. Stainless steel stop valve is divided into manual stainless steel stop valve, pneumatic stainless steel stop valve and electric stainless steel stop valve.

Holding point of stop valve

(1) The structure is simpler than the gate valve, and the manufacturing and maintenance are more convenient.

(2) The sealing surface is not easy to wear and scratch, with good sealing performance. There is no relative sliding between the valve disc and the sealing surface of the valve body during opening and closing, so the wear and scratch are not serious, with good sealing performance and long service life.

(3) During opening and closing, the valve disc stroke is small, so the height of the stop valve is smaller than that of the gate valve, but the structure length is longer than that of the gate valve.

(4) The opening and closing torque is large and the opening and closing is laborious. The opening and closing time is the principal.

(5) The fluid resistance is large. Because the medium channel in the valve body is tortuous, the fluid resistance is large and the power consumption is large.

(6) When the nominal pressure in the medium flow direction is PN ≤ 16MPa, the downstream flow is generally adopted, and the medium flows upward from the lower direction of the valve disc; When the nominal pressure is PN ≥ 20MPa, the reverse flow is generally adopted, and the medium flows down from the valve disc to increase the sealing element energy. In use, the medium of the stop valve can only flow in one direction, and the flow direction cannot be changed.

(7) The valve disc is often eroded when it is fully opened.